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Finding the Fourth Proportional to 125,863.56, 173,692.14 and 72,151.80

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Solution

The fourth proportional to 125,863.56, 173,692.14 and 72,151.80 is: 99,569.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,863.56 : 173,692.14 = 72,151.80 : x
  2. Step 2: Convert to fraction form
    125,863.56/173,692.14 = 72,151.80/x
  3. Step 3: Cross multiply
    125,863.56x = 173,692.14 × 72,151.80
  4. Step 4: Simplify right side
    125,863.56x = 12,532,200,546.85
  5. Step 5: Solve for x
    x = 12,532,200,546.85/125,863.56
  6. Step 6: Final answer
    x = 99,569.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.